Omron MX2 Series User Manual page 305

Simple Position Control Settings
The simple position control is a function only available for the 1st control. It does not work if you switch
to the 2nd control.
In addition, when the simple position control is set, the torque control is disabled. The terminal ATR
(Torque reference input permission) is disabled.
In the PM motor mode, the simple position control is not available (the parameter P012 is not displayed).
To enable the simple position control, set parameters as follows.
• Set the Simple Position Control Selection (P012) to 02 (Simple position control enabled).
• Set the Creep Speed Moving Amount (P014) and Creep Speed Setting (P015) according to the oper-
ation pattern.
Set the Creep Speed Moving Amount as a percentage of the amount of movement per motor rotation.
• Set the Multi-function Output 11/12 Selection (C021/C022), or Multi-function Relay Output (AL1,
AL2) Function Selection (C026), to 23 (POK: Position ready), then set the Positioning Completion
Range Setting (P017). This value must be set as 4 multiplication pulses (the number of pulses
obtained by dividing each phase-A pulse by 4).
If the current value reaches in the range of the target position ± P017, the POK signal will be output.
• To enable the position limit settings, set the Position Control Mode Selection (P075) to 00 (Limit).
Then, in the Position Limit Setting (Forward Side) (P072)/Position Limit Setting (Reverse Side)
(P073), set the upper/lower limit of the position control range. This value must be set as 1 multiplica-
tion pulses (equivalent the number of phase-A pulses).
If the current position moves out of the range specified in the Position Limit Setting (Forward
Side/Reverse Side), the inverter detects the E83. (Position control range trip) and shuts off the output.
• Set the actual control target position in the Multi-step Position Command 0 (P060).
This value must be set as 1 multiplication pulses (equivalent the number of phase-A pulses).
For how to enable positioning to up to eight points, refer to 6-7-6 Multi-step Position Control Settings
on page 6-45.
• It is recommended to set the 1st Control Method (A044) to 03 (Sensorless vector control).
Before you use sensorless vector control, set the motor parameters as described in 6-1 Sensorless
Vector Control on page 6-3.
• When 1st Control Method (A044) is set to any option other than 03, i.e. V/f control, both position feed-
back and speed feedback are enabled. Refer to 6-5 V/f Control with Speed Feedback on page 6-18
for details on V/f control with speed feedback, and adjust the parameters.
Note If operation is not smooth during startup due to insufficient torque, disable the automatic torque boost
function (A041 = 00) and adjust the manual torque boost parameters.
If this does not improve operation, it is recommended to use sensorless vector control (A044 = 03),
which generates high torque during startup.
• To use the simple position control, set the DC Injection Braking Selection (A051) to 00 (Disabled).
When the simple position control is enabled, the DC injection braking function works even if the DC
Injection Braking Selection (A051) is set to 00 (Disabled).
Do not set the DC Injection Braking Selection (A051) to Enabled. Doing so causes the simple posi-
tion control to malfunction.
To obtain the required level of braking power without overload detection, set the DC Injection Braking
Power (A054).
Parameter
No.
P012
P014
P015
P017
Multi-function Compact Inverter 3G3MX2-EV2 User's Manual (I666-E1)
Function name
Simple Position Control
Selection
Creep Speed Moving Amount 0.0 to 400.0
Creep Speed Setting
Positioning Completion
Range Setting
6 Vector Control and Applied Functions
Data
00: Simple position control disabled
02: Simple position control enabled
Starting Frequency to 10.00 (100.00)
0. to 10000. (4 multiplication)
Default data Unit
−
00
125.0 %
5.00 Hz
50. pulse
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